ΔE 23.0, loose: different enough that you should pick on purpose. Shadow Black is noticeably darker, much more muted than Wyldwood.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Shadow Black is noticeably darker, much more muted than Wyldwood.
The same difference applies the other way round: Wyldwood is noticeably lighter, much more saturated.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Wyldwood on the colour wheel See Shadow Black on the colour wheel
All matches: Wyldwood equivalents · Shadow Black equivalents